Door and step motor.



J. F. MQBLROY.

DOOR AND STEP MOTOR.

APPLICATION FILED PEB.29, 1912.

WITNESSES: INVENTOR ATTY wLUMBIA PL ANOGRAPH c o., wasnmu'romn. c.

Patented June 3, 1913.

2 SHEETS-SHEET 1.

J. F. MQELROY.

DOOR AND STEP MOTOR.

APPLICATION FILED IEB.29, 1912.

1,063,370. Patented June 3, 1913.

2 SHEBTSSEBET 2.

WITNESSES: INVENTOR :5. if/Maw fm atw 7/ l/QWV BY an? ATTY COLUMBIAPMNOGRAPH cm. WASHINGTON. D. c,

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JAMES E. MQELROY, OF ALBANY, NEW YORK, ASSIGNOR TO CONSOLIDATED CAR-HEATING COMPANY, A CORPORATION OF WEST VIRGINIA.

DOOR AND STEP MOTOR.

Specification of Letters Patent.

Patented June 3, 1913.

Application filed February 29, 1912. Serial No. 680,697.

To all whom it may concern Be it known that I, JAMES F. MGELROY, acitizen of the United States, residing at A1 bany, county of Albany,State of New York, have invented certain new and useful Improvements inDoor and Step Motors, the following being a full, clear, and exactdisclosure of the one form of my invention which I at present deempreferable.

For a detailed description of the present form of my invention,reference may be had to the following specification and to theaccompanying drawing, which illustrates my invention.

Figure 1 is a plan view of the motor; Fig. 2 is a side elevationthereof; Fig. 3 is a de tailed view partly in section; Fig. 4: is adiagram of the electric circuits which control the motor.

My invention relates to a motor for operating both the door and the stepof a railway car although other double operations of the same kind maybe performed thereby.

Referring to the drawings, the car door 1), which is of the slidingtype, is connected by an operating ush-link C to a crosshead E which ismoved in a direction to open the door by a cylinder A and in a directionto close the door by a cylinder B. A cylinder F parallel to A and Boperates the step 0, hinged to post W, by means of a push-link Gr,angle-lever H and links J and K. The piston P in cylinder F is operatedto raise the step from operative to inoperative positions by the airpressure admitted in its rear which also compresses a spring S thatacts, when the air pressure is released, to start the step toward itsdropped position, the remainder of it downward movement being preferablyby gravity. Air is admitted to cylinder F by a port a in cylinder Bthrough a pipe 7) containing an adjusting cock 3). Thus when airpressure is admitted to cylinder B to close the door D, the piston inthat cylinder will, near the end of its travel, uncover port a to itscompression side and admit air to cylinder F which will then lift step 0and compress spring S. The pressure in cylinder 1 will remain so long asthe pressure in cylinder B is maintained. When the door is opened bycylinder A, the piston of cylinder B is forced back beyond the port a,at a point near the beginning of its travel, leaving that port open tothe a m sphere. Thereu on the spring S forces the step out from itsraised vertical position and allows it to drop by gravity. I control themotor by a valve R of any well known kind which will admit pressure toand exhaust it from cylinders Aand B alternately. The valve R isoperated by magnets T, T which may be controlled by push-buttons V, Vrespectively. The cock p serves to determine the force of thestep-raising cylinder.

What I claim as new and desire to secure by Letters Patent is:

l. The combination with a step-operating motor of a door operating motorincluding a door-closing cylinder having a port, a pneumatic connectionbetween the port and the step operating motor, and a piston in saidcylinder and cooperating with said port to control the step-operatingmotor.

2. The combination with a Step-operating cylinder and a step-operatingspring of a door-closing cylinder having a port controlled by its pistonand controlling the said step-operating cylinder.

3. The combination with a step-operating cylinder and a step-operatingspring, of a door-closing cylinder and a separate dooropening cylinderhaving its piston connected with the piston of the door-closing cylinderand serving to retract the same, the piston of the said doorclosingcylinder serving to control a port which is alternately the admissionand exhaust port of the step-operating cylinder.

4. The combination with a step-raising cylinder, of a step-startingspring compressed by the piston of said cylinder and a doonclosingcylinder controlling a port which communicates with said step-raisingcylinder and serves alternately as the admission and. exhaust porttherefor.

5. The combination with a step-raising cylinder and a step-startingspring acting in opposition to the pressure in said cylinder, of aninlet pipe communicating with the rear end of said cylinder, acontrolling cock in said pipe, an open-ended door-closing cylindercommunicating with said pipe and a piston therein acting to put the pipein communication with the pressure side and the exhaust side thereofalternately.

6. The combination with parallel and single-ended door-closing andstep-raising cylinders, of push-links connecting them With the door andstep respectively, an inletsaid cylinder and said motor-and controlledby the motor at the beginning of the dooropening stroke and the end ofthe door closing stroke and means for imparting an initial loweringmovement to said step.

Inw'itness whereof I have hereunto set my hand; before two subscribingwitnesses this 26th day of February, 1912. 1 JAMES F. MOELROY.

Witnesses:

HERBERT A. CAULiuNs, CLARENCE PALMER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, I). G.

